<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <form>
        <label for="name">姓名</label>
        <input type="text" name='name' required pattern="^([\u4e00-\u9fa5]){2,4}$">
        <br/>
        <label for="studentcode">学号</label>
        <input type="text" name='studentcode' required pattern="^(19|20)[0-9]{6}$">
        <br/>
        <label for="phoneNumber">电话</label>
        <input type="text" name='phoneNumber' pattern="">
        <br/>
        <label for="address">地址</label>
        <input type="text" name='address'>
        <br/>
        <input type="submit">
    </form>
</body>
</html>